[MESOS-1916] Create utility class for storing sockaddr

• Type: Task
• Status: Resolved
• Priority: Minor
• Resolution: Won't Fix
• Component/s: libprocess
• Epic Link: IPv6 Support
• Assignee: Evelina Dumitrescu
• Reporter: Dominic Hamon
• Shepherd: Dominic Hamon
• Created: 14/Oct/14 17:01
• Updated: 02/Jul/15 18:43
• Resolved: 05/Dec/14 21:39

Description

// Convenience struct for when you need a |struct sockaddr|.
struct SockaddrStorage {
  SockaddrStorage() : addr_len(sizeof(addr_storage)),
                      addr(reinterpret_cast<struct sockaddr*>(&addr_storage)) {}
  SockaddrStorage(const SockaddrStorage& other);
  void operator=(const SockaddrStorage& other);

  struct sockaddr_storage addr_storage;
  socklen_t addr_len;
  struct sockaddr* const addr;
};
SockaddrStorage::SockaddrStorage(const SockaddrStorage& other)
    : addr_len(other.addr_len),
      addr(reinterpret_cast<struct sockaddr*>(&addr_storage)) {
  memcpy(addr, other.addr, addr_len);
}

void SockaddrStorage::operator=(const SockaddrStorage& other) {
  addr_len = other.addr_len;
  // addr is already set to &this->addr_storage by default ctor.
  memcpy(addr, other.addr, addr_len);
}

(shamelessly borrowed from http://src.chromium.org/svn/trunk/src/net/base/net_util.h/cc)

Issue Links

• is depended upon by: MESOS-1918 Add SockaddrStorage to IP, UPID, etc
• is superceded by: MESOS-2177 Create socket wrappers for different protocol families
• is superceded by: MESOS-2178 Add a method from converting the hostname to an ip address and create initialization wrappers for sockaddr_in and addrinfo